Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption
The modulation by the Atlantic multidecadal variability (AMV) of the dynamical climate response to a Pinatubo-like eruption is investigated for the boreal winter season based on a suite of large ensemble experiments using the CNRM-CM5 Coupled Global Circulation Model. The volcanic eruption induces a...
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ftupcatalunyair:oai:upcommons.upc.edu:2117/125382 2024-09-15T18:22:32+00:00 Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption Ménégoz, Martin Cassou, Christophe Swingedouw, Didier Ruprich-Robert, Yohan Bretonnière, Pierre-Antoine Doblas-Reyes, Francisco Barcelona Supercomputing Center 2018-09 21 p. application/pdf http://hdl.handle.net/2117/125382 https://doi.org/10.1007/s00382-017-3986-1 eng eng Springer https://link.springer.com/article/10.1007/s00382-017-3986-1 info:eu-repo/grantAgreement/EC/FP7/308378/EU/Seasonal-to-decadal climate Prediction for the improvement of European Climate Services/SPECS info:eu-repo/grantAgreement/MINECO//CGL2015-70177-R/ES/ACTIVIDAD DE LOS VOLCANOES EN PREDICCIONES CLIMATICAS ESTACIONALES Y DECENALES/ Ménégoz, M. [et al.]. Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption. "Climate Dynamics", Setembre 2018, vol. 51, núm. 5-6, p. 1863-1883. 0930-7575 http://hdl.handle.net/2117/125382 doi:10.1007/s00382-017-3986-1 Open Access Àrees temàtiques de la UPC::Enginyeria biomèdica Climate science Volcanic eruptions Climate dynamics North Atlantic Oscillation Atlantic multidecadal variability Ensemble size Climate model Clima--Observacions Canvis climàtics Article 2018 ftupcatalunyair https://doi.org/10.1007/s00382-017-3986-1 2024-07-25T11:11:16Z The modulation by the Atlantic multidecadal variability (AMV) of the dynamical climate response to a Pinatubo-like eruption is investigated for the boreal winter season based on a suite of large ensemble experiments using the CNRM-CM5 Coupled Global Circulation Model. The volcanic eruption induces a strong reduction and retraction of the Hadley cell during 2 years following the eruption and independently of the phase of the AMV. The mean extratropical westerly circulation simultaneously weakens throughout the entire atmospheric column, except at polar Northern latitudes where the zonal circulation is slightly strengthened. Yet, there are no significant changes in the modes of variability of the surface atmospheric circulation, such as the North Atlantic Oscillation (NAO), in the first and the second winters after the eruption. Significant modifications over the North Atlantic sector are only found during the third winter. Using clustering techniques, we decompose the atmospheric circulation into weather regimes and provide evidence for inhibition of the occurrence of negative NAO-type circulation in response to volcanic forcing. This forced signal is amplified in cold AMV conditions and is related to sea ice/atmosphere feedbacks in the Arctic and to tropical-extratropical teleconnections. Finally, we demonstrate that large ensembles of simulations are required to make volcanic fingerprints emerge from climate noise at mid-latitudes. Using small size ensemble could easily lead to misleading conclusions especially those related to the extratropical dynamics, and specifically the NAO. This research was carried out within the pro- jects: (i) MORDICUS funded by the French Agence Nationale de la Recherche (ANR-13-SENV-0002-02); (ii) SPECS funded by the European Commission’s Seventh Framework Research Programme under the grant agreement 308378; (iii) VOLCADEC funded by the Spanish program MINECO/FEDER (ref. CGL2015-70177-R). We thank Javier Garcia-Serrano for its comments about the NAO precursors, Omar Bellprat for ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Sea ice Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge Climate Dynamics 51 5-6 1863 1883 |
institution |
Open Polar |
collection |
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
op_collection_id |
ftupcatalunyair |
language |
English |
topic |
Àrees temàtiques de la UPC::Enginyeria biomèdica Climate science Volcanic eruptions Climate dynamics North Atlantic Oscillation Atlantic multidecadal variability Ensemble size Climate model Clima--Observacions Canvis climàtics |
spellingShingle |
Àrees temàtiques de la UPC::Enginyeria biomèdica Climate science Volcanic eruptions Climate dynamics North Atlantic Oscillation Atlantic multidecadal variability Ensemble size Climate model Clima--Observacions Canvis climàtics Ménégoz, Martin Cassou, Christophe Swingedouw, Didier Ruprich-Robert, Yohan Bretonnière, Pierre-Antoine Doblas-Reyes, Francisco Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption |
topic_facet |
Àrees temàtiques de la UPC::Enginyeria biomèdica Climate science Volcanic eruptions Climate dynamics North Atlantic Oscillation Atlantic multidecadal variability Ensemble size Climate model Clima--Observacions Canvis climàtics |
description |
The modulation by the Atlantic multidecadal variability (AMV) of the dynamical climate response to a Pinatubo-like eruption is investigated for the boreal winter season based on a suite of large ensemble experiments using the CNRM-CM5 Coupled Global Circulation Model. The volcanic eruption induces a strong reduction and retraction of the Hadley cell during 2 years following the eruption and independently of the phase of the AMV. The mean extratropical westerly circulation simultaneously weakens throughout the entire atmospheric column, except at polar Northern latitudes where the zonal circulation is slightly strengthened. Yet, there are no significant changes in the modes of variability of the surface atmospheric circulation, such as the North Atlantic Oscillation (NAO), in the first and the second winters after the eruption. Significant modifications over the North Atlantic sector are only found during the third winter. Using clustering techniques, we decompose the atmospheric circulation into weather regimes and provide evidence for inhibition of the occurrence of negative NAO-type circulation in response to volcanic forcing. This forced signal is amplified in cold AMV conditions and is related to sea ice/atmosphere feedbacks in the Arctic and to tropical-extratropical teleconnections. Finally, we demonstrate that large ensembles of simulations are required to make volcanic fingerprints emerge from climate noise at mid-latitudes. Using small size ensemble could easily lead to misleading conclusions especially those related to the extratropical dynamics, and specifically the NAO. This research was carried out within the pro- jects: (i) MORDICUS funded by the French Agence Nationale de la Recherche (ANR-13-SENV-0002-02); (ii) SPECS funded by the European Commission’s Seventh Framework Research Programme under the grant agreement 308378; (iii) VOLCADEC funded by the Spanish program MINECO/FEDER (ref. CGL2015-70177-R). We thank Javier Garcia-Serrano for its comments about the NAO precursors, Omar Bellprat for ... |
author2 |
Barcelona Supercomputing Center |
format |
Article in Journal/Newspaper |
author |
Ménégoz, Martin Cassou, Christophe Swingedouw, Didier Ruprich-Robert, Yohan Bretonnière, Pierre-Antoine Doblas-Reyes, Francisco |
author_facet |
Ménégoz, Martin Cassou, Christophe Swingedouw, Didier Ruprich-Robert, Yohan Bretonnière, Pierre-Antoine Doblas-Reyes, Francisco |
author_sort |
Ménégoz, Martin |
title |
Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption |
title_short |
Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption |
title_full |
Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption |
title_fullStr |
Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption |
title_full_unstemmed |
Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption |
title_sort |
role of the atlantic multidecadal variability in modulating the climate response to a pinatubo-like volcanic eruption |
publisher |
Springer |
publishDate |
2018 |
url |
http://hdl.handle.net/2117/125382 https://doi.org/10.1007/s00382-017-3986-1 |
genre |
North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
North Atlantic North Atlantic oscillation Sea ice |
op_relation |
https://link.springer.com/article/10.1007/s00382-017-3986-1 info:eu-repo/grantAgreement/EC/FP7/308378/EU/Seasonal-to-decadal climate Prediction for the improvement of European Climate Services/SPECS info:eu-repo/grantAgreement/MINECO//CGL2015-70177-R/ES/ACTIVIDAD DE LOS VOLCANOES EN PREDICCIONES CLIMATICAS ESTACIONALES Y DECENALES/ Ménégoz, M. [et al.]. Role of the Atlantic Multidecadal Variability in modulating the climate response to a Pinatubo-like volcanic eruption. "Climate Dynamics", Setembre 2018, vol. 51, núm. 5-6, p. 1863-1883. 0930-7575 http://hdl.handle.net/2117/125382 doi:10.1007/s00382-017-3986-1 |
op_rights |
Open Access |
op_doi |
https://doi.org/10.1007/s00382-017-3986-1 |
container_title |
Climate Dynamics |
container_volume |
51 |
container_issue |
5-6 |
container_start_page |
1863 |
op_container_end_page |
1883 |
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1810462408735457280 |